Blacksdieselhp
Comp Diesel Sponsor
Sold out of 4". The 5" was just a PITA to get it to fit right everytime, so no 5". Now we have ran into some new problems. Some guys are flipping the manifolds or using the new straight flange manifolds, so now the normal dp wont work for them. So now we are working on a universal dp. It will have to be 2 piece. I will update you when we get more done.